Purchased car with so countless faults.

I was sold a pre owned car with so many problems. I reported the faults I discovered to them of which they promised to solve but they were unable to do that till today. These are the problems I discovered about the: Warning engine sign of which i reported. Dents Wiring was not up to standard which led to the burning of fog lights. They removed them and let me drive the car with out fog lights. Sensor was also removed and replaced with a new one. Rear wiper was also removed and replaced with a new one. I am so deeply hurt by this and I wish to cancel this deal because it seems as if nobody wants to help.